Long-term follow-up result of short metaphyseal femoral stem in primary total hip arthroplasty: A retrospective study

Table 1 Demographic data

Demographic variable	Result
Age (year), mean ± SD	44 ± 7.5
Side of surgery as left/right/bilateral	72/52/26
Indication	Avascular necrosis with secondary arthritis (n =65); femoral neck fracture (n = 22); ankylosing spondylitis (n = 13); psoriatic arthritis (n = 12); post-infection sequelae (n = 12)
Mean duration of surgery (minute), mean ± SD	140 ± 25
Average blood loss (mL), mean ± SD	160 ± 50
Follow-up (year)	15

Table 2 Preoperative and postoperative functional scores at last follow-up

Functional score	Preoperative score	Postoperative score at final follow-up
Modified Harris Hip Score, mean ± SD	< 70 (poor): 100%; mean score: 19.75 ± 15.00	90-100 (excellent): 80%; 80-89 (good): 16%; 70-79 (fair): 4%; mean score: 91.66 ± 7.50
Oxford hip score, mean ± SD	12.04 ± 3.00	40.54 ± 4.50
WOMAC score	85.16	19.16
Visual analogue score, mean ± SD	7.1 ± 2.7	1.4 ± 0.7

WOMAC: Western Ontario and McMaster Universities Osteoarthritis index.

Table 3 Complications

Type of complication	Patients (n)
Heterotopic ossification	6
Varus malposition	0
Infection	1
Aseptic loosening	1
Limb length discrepancy > 1.5 cm	0
Sciatic nerve palsy	0